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Traffic Level A, etc.). Traffic levels are as defined in section 334 of the Department's Standard Specifications for Road and Bridge Construction. 334-1.4 Gradation Classification: HMA mixes are classified as either coarse or fine, depending on the overall gradation of the mixture. Coarse and fine mixes are defined in 334-3.2.2. Use only fine mixes. The equivalent AASHTO nominal maximum aggregate size Superpave mixes are as follows: Type SP -9.5, FC -9.5 9.5 mm Type SP -12.5, FC -12.5 12.5 mm 334-1.5 Thickness: The total pavement thickness of the HMA Pavement will be based on a specified spread rate or plan thickness as shown in the Contract Documents. Before paving, propose a spread rate or thickness for each individual layer meeting the requirements of this specification, which when combined with other layers (as applicable) will equal the plan spread rate or thickness. When the total pavement thickness is specified as plan thickness, the plan thickness and individual layer thickness will be converted to spread rate using the following equation: Spread rate (lbs/yd) = t x Gmm x 43.3 where: t =Thickness (in.) (Plan thickness or individual layer thickness) GMM =Maximum specific gravity from the mix design For target purposes only, spread rate calculations shall be rounded to the nearest Ode number. 334-1.5.1 Layer Thicknesses: Unless otherwise called for in the Contract Documents, the allowable layer thicknesses for HMA mixtures are as follows. Type SP -9.5, FC -9.5 3/4 - 1 1/2 inches Type SP -12.5, FC -12.5 1 1/2 - 2 1/2 inches 334-1.5.2 Additional Requirements: The following requirements also apply to HMA mixtures: 1. When construction includes the paving of adjacent shoulders (<_5 feet wide), the layer thickness for the upper pavement layer and shoulder shall be the same and paved in a single pass, unless otherwise called for in the Contract Documents. 2. For overbuild layers, use the minimum and maximum layer thicknesses as specified above unless called for differently in the Contract Documents. On variable thickness overbuild layers, the minimum allowable thickness may be reduced by 1/2 inch, and the maximum allowable thickness may be increased by 1/2 inch, unless called for differently in the Contract Documents. 334-1.6 Weight of Mixture: The weight of the mixture shall be determined as provided in 320-2.2 of the Florida Department of Transportation (FDOT) specifications. 334-2 Materials. 334-2.1 Superpave Asphalt Binder: Unless specified elsewhere in the Contract or in 334-2.3.3, use a PG 67-22 asphalt binder from the FDOT's Qualified Products List (QPL). If the Contract calls for an alternative binder, meet the requirements of FDOT Specifications Section 336 or 916, as appropriate. 01025-32 Technical Specifications F:1Public Works\ENGINEERING DIVISION PROJECTS\1024-17thStreet and IR Blvd Intersection�AdmimlContract Documents\Technical Speciti'Ications.doc